If you want to apply the Bzip2 tar patch which gives you the -y option to tar so you can use bzip2 files with tar, first download the patch from http://sourceware.cygnus.com/bzip2/ and apply it by running the following command within the src directory under the tar-1.13 directory:
cd src &&
patch -i ../../gnutarpatch.txt
Install Tar by running the following commands from the toplevel directory:
./configure --prefix=/usr &&
make &&
make install &&
mv /usr/bin/tar /bin
The tar package contains the tar and rmt programs.
tar is an archiving program designed to store and extract files from an archive file known as a tarfile.
rmt is a program used by the remote dump and restore programs in manipulating a magnetic tape drive through an interprocess communication connection.